UPD784938 Datasheet, PDF (184/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 6 PORT FUNCTIONS
6.10.2 I/O mode/control mode setting
The port 9 input/output mode is set for each pin by setting the port 9 mode register (PM9) as shown in Figure 6-65.
Figure 6-65. Port 9 Mode Register (PM9) Format
7
6
5
4
3
2
1
0 Address After reset R/W
PM9 PM97 PM96 PM95 PM94 PM93 PM92 PM91 PM90 0FF29H
FFH
R/W
PM9n P9n Pin Input/Output Mode Specification
(n = 0 to 7)
0 Output mode (output buffer on)
1 Input mode (output buffer off)
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Preliminary User’s Manual U13987EJ1V0UM00